I have a 1990 k1500 and I’m pulling the motor to get rebuilt. While doing so I’m basically trying to replace everything I can including the wiring harness on the passenger AND driver side. Right now I’m working on the driver side harness that goes from the firewall to the headlights, marker lights, blinkers and horn but I CAN NOT FIND a OEM factory replacement harness. I’m trying to keep everything original and true to spec but I can’t find a replacement harness for the life of me that is a OEM replacement. I need it to go from the firewall to the bulbs. Also if anyone knows where to get the firewall plug block and anything els that would be great! Please help!